Surface preparation of bioactive Ni-Ti alloy using alkali, thermal treatments and spark oxidation.

Journal of Materials Science. Materials in Medicine
W ChrzanowskiJ C Knowles

Abstract

The primary aim of this study was to compare different surface treatments used for bioactivation of pure titanium surfaces--thermal, alkali treatment and spark oxidation, and to assess their suitability as treatments for Ni-Ti alloys. This was considered by examining the surface properties, calcium phosphate precipitation from a physiological solution, and nickel ion release. Additionally, changes in the transformation temperature were measured for thermally treated samples. These studies indicate that the native surface of Ni-Ti alloy is highly bioactive when assessing the precipitation of calcium phosphates from Hank's solution. Low temperature heat treatments also produced promising surfaces while high temperature treatment resulted in a very low rate of Ca and P precipitation. Alkali treatment and spark oxidation resulted in some bioactivity. Nickel ion release was greatest for alkali treated and sparks oxidized samples, and the rate of its release from these two samples was on the verge of daily safe dose for adolescent human. The other analyzed samples revealed very low rates of nickel ion release. Heat treatment at 400 degrees C resulted in significant increase in the transformation temperatures, and a further increase o...Continue Reading

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Citations

Jun 21, 2012·Journal of Materials Science. Materials in Medicine·W ChrzanowskiHae-Won Kim
Jul 9, 2010·Australasian Physical & Engineering Sciences in Medicine·Qiang LiXiaoying Tang
Jan 31, 2008·Journal of the Royal Society, Interface·Wojciech ChrzanowskiJonathan Campbell Knowles
Jun 21, 2008·Acta Biomaterialia·Wojciech ChrzanowskiJonathan Campbell Knowles
Jan 30, 2013·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Zhiguang HuanJurek Duszczyk
Dec 22, 2009·Journal of Biomedical Materials Research. Part a·Wojciech ChrzanowskiVehid Salih
Aug 25, 2011·Journal of Biomaterials Applications·W ChrzanowskiM J Dalby
May 26, 2018·Journal of Tissue Engineering·Shiva Kamini DivakarlaWojciech Chrzanowski
Jul 27, 2010·Artificial Cells, Blood Substitutes, and Immobilization Biotechnology·Qiang LiYanjum Zeng
Jan 2, 2020·Environmental Science and Pollution Research International·Jana VeverkovaMonika Pavkova Goldbergova

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